Intro

Hi I am Dave Zhang 1P333. This is my Science E-portfolio, I have put in my effort, there are videos pictures and useful information, sit back and relax!!

SI units

temperature-Kelvin K
time-second s
length-metre M
electric current-ampere A
mass-kilogram kg
intensity of light-candela cd
amount of substance-mole mol

Giga	One billion 1000 000 000	G	1 Gm = 1 gigametre = 1000 000 000 metres
Mega	One million 1000 000	M	1 Ms = 1 megasecond = 1000 000 seconds
Kilo	One thousand 1000	k	1 kg = 1 kilogram = 1000 grams
Deci	One tenth 1/10	d	1 dg = 1 decigram = 1/10 grams
Centi	One hundredth 1/100	c	1 cm = 1 centimetre = 1/100
Milli	One thousandth 1/1000	m	1 ml = 1 millilitre = 1/1000 litres
Micro	One millionth 1/1000 000	µ	1µl = 1 microlitre = 1/1000 000 litres
Nano	One billionth 1/1000 000 000	n	1ns = 1 nanosecond = 1/1000 000 000 seconds

Vernier calipers

Inside jaws- used to measure the internal diameter of an object
Outside jaws- used to measure the external diameter or width of an object
Main scale- gives measurements of up to one decimal place
Vernier scale- gives measurements of up to  two decimal places
Tail-used to measure the depth of an object or hole